Gearing.



A. SUNDH. GEARING. APPLIoATIoN FILED SEPT. 5, 1911.

UNITED sTrim", EeaqlilNTOFFICE f AUGUST sUNDH, or HAsLrINGs-UroN-HUDSON,-NiavV Yonx, AssIGNoR 'ro ons ELE- VATOR COMPANY, JERSEY.

To all whom it may concern:

Beit known that I, AUGUSTFSUNDH, of H astngs-uponI-Iudson, county ofWestchester. State of New York, have invented a new and usefulImprovement in Gearing, of which the following isv a frh-clear, andexact description.

The object of the invention is to provide a new and improved yieldable,self-alining gear, whichis simple and compact in construction, andeffectiveyin operation. y

The invention consists of certainparts, details and combinations of sameas will be vfully described hereinafter and then pointed out in theclaims.

Reference is to be had tothe accompany-v ing drawing forming'a partofthe specification, in which similar lettersV of reference indicatecorresponding'parts in all the tigures. y

Figure l is a side view of'a toothed gear with my invent-ion appliedthereto. Fig. 2 is a front view of Fig. l. Fig. 3 is a sectional view,on line 3 3., Fig. 2. Fig.` 4 is a sectional view, onr line 44, Fig. 1.Fig. 5 is an end view of my invention applied to an internal toothedgear or annulus. Fig. 6 is a sectional view of my invention applied as acoupling. l

My improved gear is comprised of substantially three elements or parts,to wit:

an inner or central element, indicated by' reference letter A on thedrawing, an outer element or part, indicated by the reference letter Bon the drawing, which,

-outer element surrounds the inner element,

and an intermediate element C. The outer periphery of the inner elementand the inner periphery of the outer element are corrugated or waved,the corrugations on the faces of the respective parts being substantially of corresponding shape, so that the 'inner kpart or element-uponbeing rotated will impart its motion to the outer part 'or the outerpartbeing rotated will impart its `motion to the inner part.- Thecorrugations are transverse of the periphery of the vtwo elements, andthere is a clearance-space left between the opposing faces of the parts,in

which thereis placed the third part or element, C. consisting of a stripor band ot"` metal. preferably steel, which strip may be of suicientthinness to be wound or-otherwise placed in the clearance space, in asingle layer: or the clearance space between the Specification ofLetters Patent.

Application led September 5, 1911. Serial Nol-647,464. A

row, Fig. 3.

A, will press against the strip,`C, substanoF JERSEY CITY, .NEW JERSEY,A CORPORATION 0.1.1` NEW GEABING.

Patented Feb.

parts, A and B, may be of sufficient dimenf sions to allow the strip ofmetal to bewound in the clearance space a number of times. I haveindicated onthe drawing, seev Figs. 3 and 4, for instance, the strip, C,as being wound a number of layers between the parts, A and B. Ipreferably enlarge the clearance space, beginning at about the middle Dof the corrugations of the parts, A and B, and flaring outwardly to thesides of those parts asA indicated by the reference letter, E. Theflaring may bein one, or both ofthe parts, A and B. This lflaringfeature practically amounts to a nearer approach of the parts, A and B,to each other at substantially a point, D, Figs. 3 and 4, included in amedian line drawn around the circumferences of those two parts. Now,

by closely packing the strip between the two parts, A and B., at thepoint or points ,of their nearest approach, there is obtained, ineffect, a pivotal point, about which there may be, and in some caseswillbe, a slight pivotal or rocking movement of the parts, lA and' B,relatively to each other, thereby permitting theI gear to aline itself.This feature is carried out in the construction vofmy gear by having theapex of the corrugations at the median line, slightly closer to theopposing concavities or bottomsv than at the sides of the cprrugationsin the parts, A and B, as

clearly shown in Fig. 3. I enlarge'thatpor-l tion ofthe clearance spacebetween' the sides of the corrugations, by lessening the height oftheshoulders of the corrugations, or by. increasing the depth' of the opp()si11gcon` cavities or bottoms, as clearly shown in Fig.

3, at the locality F. This feature secures' a yielding relationbetweenvthe parts, A and B, sincevit. allows ay relative movementbetween those parts. Further to explain;-v letit be rimagined thatmotion is imparted to the inner part A in the direction of the arrThecorrugat-ions on the part,

tially in the direction of the arrow, and by reason of the fact thatthestrip, C, does not occupyall the space in that portion of-thevclearance space substantially opposed to the los.

H, Fig. 6, the application thereto being so y plain as not to requireany further tentual description.

lflfhile I have shown the outer element. B, in Fig. i, as a toothedgear, it is plain that the part B might be shown as having a plain outerperiphery instead of a toothed periphery, to be used as a friction orbelt gear. t It is also plain that I might have shown the parts, and B,as having the corrugations extending from their lateral faces andengaging each/other. While I hare shown4 the corrugations rounded, it isplain that they may be of any suitable form.

rlhe part Alis shown in Figs. l, 2, 3, and 4, as keyed to a shaft, L andthere is a face plate, A J, which is shown secured fast to the part B,with a slight clearance between the plate and the part A, and the shaft,I. It will be observed that the face plate serves to retain the part Bin position with respect to thepart and this strip C between the parts Aand B, and yet allows any relative movement by the parts A, B,

C, and I; i

` I am aware that it has been proposed to us'e rubber or springs betweendriving and driven parts; but they have not been arranged, so far as Iam-aware, toallow the driven part to be self-alining without, at thesame time, allowingthe axis of the driven part to be changed. Thisfeature of aline-V ment is of course highly important in gears; it wouldappear that rubber or a spring cannot be successfully used for thispurpose, because the center of the'axis of the gear must remain xed,whereas rubber Vor a spring will allow the center of the axis of thedriven part of the gear to be changed under the strain of theapplication of power tc' it, both by the inner part of the yieldablegear, and the resistance offered by the gear to be driven by the outwardpart of the yieldable gear. I have successfully taken care ofthisobjection to rubber or' a spring by using a metal strip'` closely packedin between the apex of the corrugations and the concave opposingsurfaces, all of which I' vertheless, I have' ob have described. .taineda yieldable ear, as is obtained by the use of rubber or a spring,notwithstanding the fact that I use a metal strip. I obtain posing sidesof the"corrugations, thereby l permittinga slight movement of the stripthe yieldable feature by enlarging 'the op-.

irrigare and the added advantage over them of a self alining gear.lhiithei'niore, the strip is .g tempered and retains its original. di-

nsions and generally, l have found it to better than rubber or a springor any 1. ng like them; and the gear will always herefore, aline itselfperfectly.

(it course. various changes of the details might be made within thescope of my intention; I therefore wish not to be limited to the exactconstruction disclosed.

y lWhile I have disclosed my invention as comprising substantially threeparts, it is obvious Jthat the invention comprises any number of partsgreater than three, for instance, the inner and outer parts may consistof two parts or any number Agreater than two, and if those parts shallconsist of any number greater than two, a band may be placed between twoof the opposing parts a5 or between all of the opposing parts.

lll/'hat I claim as new, and desire to secure by Letters Patent of theUnited States, is

l. In a device of the class described, the combination of several partsor elements to be rotated, having corrugations, with a clearance spacebetween the corrugations von one part and the corrugations on anotherpart; and a strip or band of elastic material in the space. 95

2. In a device ofthe class described, the combination of several partsor elements to be rotated, having corrugations, Awith a clearance spacebetween the corrugations on one part and the corrugations on anotherpart; and al strip or band of steel in the space.4

3. Inra device of the class described, the combination of several partsor elements to be rotated, having corrugations, with a clearance spacebetweeny the corrugations on one part and the corrugations cn anotherpart; the space being narrower at the median circumferential line of thetwo parts' than at the end circumferential lines of the said two parts;and a strip or band of material in the space and occupying all thenarrow portion or part of the space; the part of the said strip in the'narrower portion of the said space being unyielding to deformation. 115

4J In a device of the class described, the combination of. several,parts or elements to be rotated, having' corrugations, with a clearancespace between the corrugations on one part and thecorrugat-ionsonanother 120 part; the space being narrower at the mediancircumferential line of the two parts than at the end circumferentiallines of/the said two parts; and a' strip or band of steel in the space,and occupying all the narrow 125 portion of the saidV space.

' 5. Ina device of theclass described, the combination of'several partsor elements to. be rotated, vhaving corrugations, withA a clearancespace between the corrugat-ions on .1.30

. space; that portion of the strip'in the nar.

one part and the corrugations on' another part;- the space beingnarrower Aat the median (':ircum'ferentia'l line of the two parts andflarin outward to the sides of the two parts; an `a strip of steelintheclearance rower part of Vtlie space occupying all the space there; andthat port-ion of the strip not in the narrow part of the clearance, not`occupfmg all .tle space, but being free to bev `faces of the parts beingcorrugated to correspond substantially, to each other, and the outer.face of the outer part having gear teeth; and a strip of steel in theclearance 7. A gear, comprising inner and outer parts, separated fromeach other, with a clearance space therebetween, the opposing facesbeing corrugated to 'correspond substantially to eachother; theclearance space being narrower at the median circumferen- '-tia .l hneof the ,saidftwo parts than at the sides of the latter; and a strip ofsteel fitted closely in the narrower portion ,of the clearance space.

8. A gear, comprising inner and outer par-ts, separated from each other,with a clearance space therebetween, the opposing faces being corrugatedto' correspond substantially to each other; the clearance space beingwider between the sides of th opposling corrugations than between thetop of a corrugation on one of the said parts and the concavity oppositeto the top in the other parts; and a strip or bandof'steel in theclearance space, not occupying allthe wider part of the said'space.

'9. A gear, comprising parts, separated from each other to form aclearance space; the outer; face 'of 'the outer part having gear teeth;the inner face of the outer part and the outer face ofthe inner part,being corrugated to'correspond substantially to each other; theclearance-space being narrower at-the median circumferen# tial line ofthe said two parts than at the vsides of the latter; and theclearance'space between the sides of opposing corrugations being widerthan at the tops of the opposing corrugations; a strip of steel intheclearance space, fitted closely between the outer' and inner parts alongthe median circumferential line, and more or-less loosely in the .spacebetween the sides-of" the corrugations.

l0. In the class of article described, a yieldable, self-alinnggeen/comprised substantially ofv an inner and'outer part, sep. aratedfrom each other,` but arranged to engage each other; and a'strip ofhard, elastic material placed between the said inner and outer parts. lv Y 11. In the class ofarticledescribed, a yieldable, self-alining gear,comprised sub-` stantially of an inner and outer part, separated fromeach other, but arranged to engage each other; and a stripof hard,elastic' material placed between the said IInner and uter parts, and aface-plate-'secured to th inner part. I

In testimonywhereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

AUGUST SUNDH. -Witnessesz WALTER C. mane;

inner and outer

